Hybrid adhesive tissue cover

Abstract

A cover for protecting a tissue site may comprise a shell layer, an adhesive disposed on the shell layer, and a contact layer disposed adjacent to the adhesive. The contact layer may have an open area of about 40 percent to about 50 percent of the total area of the contact layer. A release liner may be disposed adjacent to the contact layer. Perforations through the shell layer and the contact layer can define a sacrificial segment configured to be separated from the shell layer and the contact layer. A handling bar may be coupled to the sacrificial segment.

1 . A cover for protecting a tissue site, the cover comprising:
 a shell layer;   an adhesive disposed on the shell layer;   a contact layer disposed adjacent to the adhesive, the contact layer having an open area of about 40 percent to about 50 percent;   a sacrificial segment defined by perforations through at least the shell layer and the contact layer;   a handling bar coupled to the sacrificial segment; and   a release liner adjacent to the contact layer.   
     
     
         2 . The cover of  claim 1 , wherein the open area is formed by a plurality of holes through the contact layer. 
     
     
         3 . The cover of  claim 1 , wherein the open area is formed by a plurality of holes through the contact layer arranged in a pattern of rows. 
     
     
         4 . The cover of  claim 1 , wherein the open area is formed by a plurality of holes through the contact layer arranged in pattern of rows that are staggered. 
     
     
         5 . The cover of  claim 1 , wherein the open area is formed by a plurality of holes through the contact layer, the plurality of holes arranged in a pattern of rows that are staggered at 45 degrees. 
     
     
         6 . The cover of  claim 1 , wherein the open area is formed by a plurality of holes through the contact layer, the plurality of holes arranged in a pattern of rows that are staggered at 45 degrees and a pitch of about 9 millimeters to about 10 millimeters. 
     
     
         7 . The cover of  claim 1 , wherein the open area is formed by a plurality of holes through the contact layer, and at least some of the plurality of holes are arranged in a row having a midline substantially aligned with the perforations. 
     
     
         8 . The cover of  claim 1 , wherein the perforations have a cut length of about 2 millimeters and a tie length of about 1 millimeter. 
     
     
         9 . The cover of  claim 1 , wherein the perforations are slots having a cut length of about 2 millimeters and a tie length of about 1 millimeter. 
     
     
         10 . The cover of  claim 1 , wherein the handling bar is at least partially disposed between the shell layer and the contact layer. 
     
     
         11 . The cover of  claim 1 , wherein the handling bar is at least partially disposed between the shell layer and the contact layer exterior to the perforations. 
     
     
         12 . The cover of  claim 1 , wherein the shell layer comprises a polymer film. 
     
     
         13 . The cover of  claim 1 , wherein the shell layer comprises a polyurethane film. 
     
     
         14 . The cover of  claim 1 , wherein the contact layer comprises a silicone gel. 
     
     
         15 . An apparatus for protecting a tissue site, the apparatus comprising:
 a contact layer having a first edge and a second edge parallel to the first edge;   a plurality of apertures in the contact layer, the plurality of apertures arranged in a first row having a first midline parallel to the first edge and a second row having a second midline parallel to the second edge;   a drape having an adhesive on one side, wherein at least some of the adhesive is disposed adjacent to the plurality of apertures and the drape is coextensive with the contact layer;   a first line of perforations through at least the drape and the contact layer, wherein the first line of perforations is aligned with the first midline;   a second line of perforations through at least the drape and the contact layer, wherein the second line of perforations is aligned with the second midline;   a first handling bar partially disposed between the contact layer and the drape exterior to the first line of perforations;   a second handling bar partially disposed between the contact layer and the drape exterior to the second line of perforations; and   a release liner adjacent to the contact layer.   
     
     
         16 . The apparatus of  claim 15 , wherein the first line of perforations and the second line of perforations form a sacrificial segment configured to be separated from the drape and the contact layer. 
     
     
         17 . The apparatus of  claim 15 , wherein the plurality of apertures form an open area of about 40 percent to about 50 percent of the contact layer. 
     
     
         18 . A method of manufacturing a cover for a tissue site, the method comprising:
 perforating a contact layer;   disposing a handling bar on the contact layer;   disposing a barrier layer having an adhesive on the contact layer over the handling bar;   perforating the barrier layer and the contact layer along an interior edge of the handling bar; and   disposing a release liner on the contact layer.   
     
     
         19 . The method of  claim 18 , wherein the barrier layer and the contact layer are perforated with a roller die having a cut length of about 2 millimeters. 
     
     
         20 . The method of  claim 18 , wherein the barrier layer and the contact layer are perforated with a roller die having a tie length of about 1 millimeter. 
     
     
         21 . The method of  claim 18 , wherein the barrier layer and the contact layer are perforated with a roller die having a cut length of about 2 millimeters and a tie length of about 1 millimeter. 
     
     
         22 . The method of  claim 18 , wherein the barrier layer comprises a polymer film. 
     
     
         23 . The method of  claim 18 , wherein the barrier layer comprises a polyurethane film. 
     
     
         24 . The method of  claim 18 , wherein the contact layer comprises a silicone gel. 
     
     
         25 . (canceled)